Crank-plate for bolster-springs



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L. A. BONHAM.

- 7 CRANK PLATE FOR BOLSTBR SPRINGS. No; 392,307. Patented Nov. 6,1888.

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UNITED STATES PATENT EEICE.

LOUIS ARON BONHAM, OF ST. FRANCIS, WISCONSIN.

CRANK-PLATE FOR BOLSTER-SPRINGS.

SPECIFICATION forming part of Letters Patent No. 392,307, dated November 6, I 888.

Application filed August 3, 1888. Serial No. 281,842. (No model.)

To 00% whom, it 17mg concern:

Be it known that I, LOUIS ARON BONHAM, a citizen of the United States, residing at St. Francis, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Crank-Plates i'or Bolster- Springs, oilwhichthefollowingisaspecification.

My invention relates to improvements in crank-plates for bolster-springs; and it consists in a certain novel construction and arrangement of parts, fully set forth hereinafter in connection with the accompanying drawings, and speeiiicallypointed out in the appended claims.

In the drawings, Figure 1 is a perspective view of the crank embodying my improvements applied in the operative position to a bolster,with the crank mounted therein. Fig. 2 is a longitudinal central sectional view of the same. Fig. 3 is a detail view of the improved bearing with the parts detached.

Referring to the drawings by letter, A designates the base-plate of the improved crankbearing, on the upper surface of which is formed a transverse wedge-shaped projection or rib, B, having a longitudinal groove, 0, therein, which forms a half-bearing. The outer end of the base-plate is bifurcated to form'the arms D D, which are adapted to pass on opposite sides of the bolster-standard E, and the inner ends of the said arms are provided on their uppersides with the recesses or depressions F F.

G represents a cap-plate which fits over the base-plate, and is provided in its under side with the V-shaped groove H, whichis adapted to receive the wedge shaped projection or rib B. w

K represents a groove or half-bearing,which communicates with the groove H and registers with the half-bearing 0, thus forming, when in combination with the said half-bearing, a complete bearing, in which is mounted the crank L. The springs M M are connected to the ends of the said crank in the ordinary manner.

The inner side of the cap-plate is provided with the ears N N, having apertures it n,which register with similar apertures, a a, in the base-plate, and screws or bolts 0 O engage the said apertures. The outer side of the capplate is provided with ears 1? P, which fit in the recesses or depressions F F, and the ears and the plate are provided with registering apertures p and f, through which are passed suitable screws, P. It will be seen that the ears P P are flush with theEupper side of the plate and fit tightly against opposite sides of the bolster-standard, and the outer side of the cap-plate is shaped to form a vertical bearingface, Q, which bears against the inner side of the standard.

The advantages of my invention are, it is easily and cheaply manufactured and strengthens the bolster-standard, all the wear is taken by the bearing and there is little or no chance of breakage, and there is no risk of the crank being accidentally released from the bearing.

I am aware of the patents of A. J. Spalding (No. 287 ,063) and John Smith, (No. 287,335,) both of October 28, 1883, and I do not desire to claim the construction shown therein.

Having thus described the invention, I claim 1. The crank-plate comprising thebase-piate provided with a transverse upwardly-tapered rib having a half-bearing, O, in its upper side, and the cap-plate bearing on and affixed to the base-plate, and provided with a tapered groove fitting over the said rib, and a halfbearing, K, registering with the bearing 0, in combination with'the crank mounted in the registering half-bearings and having bolstersprings connected thereto, substantially as specified.

2. The crank-plate for bolster-springs, comprising the base-plate provided with a wedgeshaped rib or projection having a half-bearing, C, the arms D D on the base-plate, passing on opposite sides of the bolster-standard, the cap-plate fitting over the plate and provided with a V-shaped groove, H, fitting over the wedge-shaped rib or projection, and a halfbearing, K, registering with the half-bearing C, the earsN N on the inner side of the cap plate, provided with apertures registering with apertures in the base-plate, through which pass suitable screws, and the ears P P on the outer side of the cap-plate, fitting in recesses or depressions F F in the arms D D, and passing, respectively, on opposite sides of the bolster-standard, the outer side of the said I In testimony thatIclaim the foregoingas my cap-plate being provided with a bearing-face, own I have hereto affixed my signature in pres Q, to bear against the inner side of the said enee of two witnesses. standard, in combination with the crank LOUIS ARON BONHAM.

5 mounted in the registering halfbearings and having the springs connected thereto, substantially as specified.

Witnesses:

V. O. WILLIAMS, H. L. EATON. 

